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This Masterflow slip coupler is ideal for connecting EN 1057 standard hard, half-hard, and soft copper tubes and pipes with a permanent press joint. It ensures quick and easy installation without the need for a flame or extensive preparation. Suitable for HVAC, hot, and cold water applications, it offers versatile use. Available in various sizes, it is resistant to corrosion, ensuring long-lasting performance. The O-ring comes with leak indicators for added security. Designed for use with M Profile press machines and WRAS approved, it guarantees reliability and efficiency.. JTM WRAS Copper M-Press Slip Coupling - 15mm PRE01S15